# -*- coding: utf-8 -*-
#
# gdb-frontend is a easy, flexible and extensionable gui debugger
#
# https://github.com/rohanrhu/gdb-frontend
# https://oguzhaneroglu.com/projects/gdb-frontend/
#
# Licensed under GNU/GPLv3
# Copyright (C) 2019, Oğuzhan Eroğlu (https://oguzhaneroglu.com/) <rohanrhu2@gmail.com>

"""
GDBFrontend Enhanced Collabration API
"""

import importlib
import json
import threading

import config
import settings
import util
import api.debug
import api.flags
import api.globalvars

gdb = importlib.import_module("gdb")

api.globalvars.init()
settings.init()

state = api.globalvars.collabration_state

lock = False

def init():
    global lock
    lock = threading.Lock()

    global state

def access(function):
    global lock
    global state

    lock.acquire()
    function()
    lock.release()

def checkClientWindowResolutions():
    """
    Checks window sizes of all client browsers and
    returns true or false as they are same or not.
    """

    global state
    
    res = api.globalvars.httpServer.ws_clients[0].screen_resolution
    
    for client in api.globalvars.httpServer.ws_clients[1:]:
        if \
            abs(res[0] - client.screen_resolution[0]) > settings.ENHANCED_COLLABRATION_RESOLUTION_TRESHOLD \
            or \
            abs(res[1] - client.screen_resolution[1]) > settings.ENHANCED_COLLABRATION_RESOLUTION_TRESHOLD \
        :
            return False
    
    return True

@api.debug.threadSafe(no_interrupt=True)
def enableEnhancedCollabration():
    """
    Enables enhanced collabration features
    that synchronize all clients.
    """

    global state

    api.globalvars.is_enhanced_collabration = True
    
    for client in api.globalvars.httpServer.ws_clients:
        client.wsSend("{\"event\": \"enhanced_collabration_enabled\"}")
    
    return True

@api.debug.threadSafe(no_interrupt=True)
def disableEnhancedCollabration():
    """
    Disables enhanced collabration features
    that synchronize all clients.
    """

    global state

    api.globalvars.is_enhanced_collabration = False

    api.globalvars.collabration_state["draw"]["path_color"] = 0
    api.globalvars.collabration_state["draw"]["paths"] = []
    
    for client in api.globalvars.httpServer.ws_clients:
        client.wsSend("{\"event\": \"enhanced_collabration_disabled\"}")
    
    return True

def setState(new_state, client_id=0):
    """
    Sets the state of collabrative things
    and sends new sate to all clients.
    """

    global state

    util.verbose("api.collabration.setState()", new_state)

    state["editor"]["file"] = new_state["editor"]["file"]
    state["editor"]["open_files"] = new_state["editor"]["open_files"]
    
    client = api.globalvars.httpServer.getClientById(client_id)
    client.screen_resolution = new_state["resolution"]
    
    sendState(from_client=client_id)

def setState__scroll(scroll_position, client_id=0):
    """
    Sets the scroll position of current editor
    and sends new sate to all clients.
    """

    global state

    util.verbose("api.collabration.setState__scroll()", scroll_position)

    state["editor"]["scroll_position"] = scroll_position

    sendState__scroll(from_client=client_id)

def setState__cursor(cursor_position, client_id=0):
    """
    Sets the cursor position of current editor
    and sends new sate to all clients.
    """

    global state

    util.verbose("api.collabration.setState__cursor()", cursor_position)

    state["editor"]["cursor_position"] = cursor_position

    sendState__cursor(from_client=client_id)

def setState__watches(watches, client_id=0):
    """
    Sets the watches state
    and sends new sate to all clients.
    """

    global state

    util.verbose("api.collabration.setState__watches()", watches)

    state["watches"] = watches

    sendState__watches(from_client=client_id)

def setState__draw_path(path, client_id=0):
    """
    Adds the path to drawing paths
    and sends new sate to all clients.
    """

    global state

    util.verbose("api.collabration.setState__draw_path()", path)

    state["draw"]["paths"].append(path)

    state["draw"]["path_color"] = (state["draw"]["path_color"] + 1) % 10

    sendState__draw_path(from_client=client_id)

def setState__draw_clear(client_id=0):
    """
    Clears drawing paths
    and sends new sate to all clients.
    """

    global state

    util.verbose("api.collabration.setState__draw_clear()")

    state["draw"]["path_color"] = 0
    state["draw"]["paths"] = []

    sendState__draw_clear(from_client=client_id)

@api.debug.threadSafe(no_interrupt=True)
def sendState(from_client=0):
    """
    Sends collabration state to all clients.
    """

    global state

    if config.VERBOSE:
        message = {}
        message["event"] = "enhanced_collabration_state"
        message["state"] = state
        message["from_client"] = from_client
        message["state"]["is_resolutions_equal"] = checkClientWindowResolutions()
        
        util.verbose("api.collabration.sendState()", message)

    for client in api.globalvars.httpServer.ws_clients:
        message = {}
        message["event"] = "enhanced_collabration_state"
        message["state"] = state
        message["from_client"] = from_client
        message["state"]["is_resolutions_equal"] = checkClientWindowResolutions()
        message["is_from_me"] = (from_client == client.client_id)
        message_json = json.dumps(message)

        client.wsSend(message_json)
    
    return True

def sendState__scroll(from_client=0):
    """
    Sends collabration state of scroll position to all clients.
    """

    global state

    if config.VERBOSE:
        message = {}
        message["event"] = "enhanced_collabration_state__scroll"
        message["scroll_position"] = state["editor"]["scroll_position"]
        
        util.verbose("api.collabration.sendState__scroll()", message)

    for client in api.globalvars.httpServer.ws_clients:
        message = {}
        message["event"] = "enhanced_collabration_state__scroll"
        message["scroll_position"] = state["editor"]["scroll_position"]
        message["is_from_me"] = (from_client == client.client_id)
        message_json = json.dumps(message)

        client.wsSend(message_json)
    
    return True

def sendState__cursor(from_client=0):
    """
    Sends collabration state of cursor position to all clients.
    """

    global state


    if config.VERBOSE:
        message = {}
        message["event"] = "enhanced_collabration_state__cursor"
        message["cursor_position"] = state["editor"]["cursor_position"]
        
        util.verbose("api.collabration.sendState__cursor()", message)

    for client in api.globalvars.httpServer.ws_clients:
        message = {}
        message["event"] = "enhanced_collabration_state__cursor"
        message["cursor_position"] = state["editor"]["cursor_position"]
        message["is_from_me"] = (from_client == client.client_id)
        message_json = json.dumps(message)

        client.wsSend(message_json)
    
    return True

def sendState__watches(from_client=0):
    """
    Sends collabration state of watches to all clients.
    """

    global state

    if config.VERBOSE:
        message = {}
        message["event"] = "enhanced_collabration_state__watches"
        message["watches"] = state["watches"]
        
        util.verbose("api.collabration.sendState__watches()", message)

    for client in api.globalvars.httpServer.ws_clients:
        message = {}
        message["event"] = "enhanced_collabration_state__watches"
        message["watches"] = state["watches"]
        message["is_from_me"] = (from_client == client.client_id)
        message_json = json.dumps(message)

        client.wsSend(message_json)
    
    return True

def sendState__draw_path(from_client=0):
    """
    Sends the drawing path to all clients.
    """

    global state

    if config.VERBOSE:
        message = {}
        message["event"] = "enhanced_collabration_state__draw_path"
        message["path"] = state["draw"]["paths"][-1]
        message["draw"] = {}
        message["draw"]["path_color"] = state["draw"]["path_color"]
        
        util.verbose("api.collabration.sendState__draw_path()", message)

    for client in api.globalvars.httpServer.ws_clients:
        message = {}
        message["event"] = "enhanced_collabration_state__draw_path"
        message["path"] = state["draw"]["paths"][-1]
        message["is_from_me"] = (from_client == client.client_id)
        message["draw"] = {}
        message["draw"]["path_color"] = state["draw"]["path_color"]
        message_json = json.dumps(message)

        client.wsSend(message_json)
    
    return True

def sendState__draw_clear(from_client=0):
    """
    Sends the clear drawings signal to all clients.
    """

    global state

    if config.VERBOSE:
        message = {}
        message["event"] = "enhanced_collabration_state__draw_clear"
        
        util.verbose("api.collabration.sendState__draw_path()", message)

    for client in api.globalvars.httpServer.ws_clients:
        message = {}
        message["event"] = "enhanced_collabration_state__draw_clear"
        message["is_from_me"] = (from_client == client.client_id)
        message_json = json.dumps(message)

        client.wsSend(message_json)
    
    return True